who has rerouted their dump tube

[martins_240sx]

Just like the title says. who has put the dump tube routed into their exhaust. if so do you have any pics

[480sx]

Most people recirculate for a DD. If not, its really damned loud.

[WDRacing]

I like the open gate...lol. Lets me know when I'm at full boost without the need for looking at the gauge

But definitly have the dump pipe run out from the engine bay. This will cut down on temps and fumes in a big way.

WD

[martins_240sx]

i currently have mine dumped out the bottom (jgs kit) I thought it was weird the dyno man put earmuffs on, then when the wastegate opened i never thought i would hear again. this thing is loud as fuk. especially passing cars on the freeway. i was just trying to get visual ideas for when i do mine. thanks for the pic

[livinglegend2100]

ugh... sexy. makes me kick myself in the arse for going t2...

next stop, t3/t4

[GEO]

Mines reciruclated... out the side of the car behind the drivers wheel. :-)

[oz240red]

I got a flex pipe from Napa and welded it to the dump pipe, then had a muffler shop weld a small pipe as parallel as possible to the exhaust somewhere under the driver's floor and hooked the flex pipe to it. Here's how it looks:

[eazye2000]

ugh... sexy. makes me kick myself in the arse for going t2...

Hey, I got a T2 and it's externally gated..

It's an open dump, so I don't have much to contribute to this thread. Although I am on overtime today here at work, so I will abuse it by googling images for you. lol

[C-Kwik]

Most people recirculate for a DD. If not, its really damned loud.

This looks like a crack in the exhaust waiting to happen.

Wastegate tubing goes through different heat cycles (thus expansion rates) than the rest of the exhaust. Its recommended that some kind of bellow is used in the dumptube to reduce stress. Not that I ever did this, but mine did crack once.

[480sx]

This looks like a crack in the exhaust waiting to happen.

Wastegate tubing goes through different heat cycles (thus expansion rates) than the rest of the exhaust. Its recommended that some kind of bellow is used in the dumptube to reduce stress. Not that I ever did this, but mine did crack once.

I guess this is similar to times where an 'engineer'(theoretically) trys to tell a 'builder' whats right, lol, its just kinda funny to me.

Alright. First off, those style dump tubes are used by pretty much everyone if they are externally wastegated on a tubular manifold.

While supporting the dump tube with SS rods or a bracket welded from the turbo flange to your dump tube and possibly your wastegate flange is ideal, an internal anything is not.

-1. Tig welding a 'bellow'(or anything like it) inside a ~1.5 in curved pipe is going to be very difficult. (can you give me your definition of bellow?)

-2. You are going to obstruct flow. The best way to describe it is air cavitation over something like that inside your wastegate tube. Air/gas is very particular in its movement when optimal flow is considered. Its CRITICAL that the path of gas for the wastegate dump tube and recirculation tube is smooth allowing for the highest level of flow. With the 'bellow' installed and the welding to secure it, your looking at a significant disruption in flow.

-3. All manifolds crack. There is no getting away from this. If reliability is your primary concern, then you go with a cast iron manifold. I am mostly concerned with power, functionality, and so forth. When a manifold is built correctly, the chances of it cracking are considered fairly negligible. Thermal management is key to the life of your manifold.

-4. If it cracks, you weld it up, and keep running it.

Also Kwik, that was a picture of my motor a long time ago. That manifold is sold and on my customers car as we speak. I didnt run it without wrapping the rest of the tube.

[WDRacing]

I guess this is similar to times where an 'engineer'(theoretically) trys to tell a 'builder' whats right, lol, its just kinda funny to me.

Alright. First off, those style dump tubes are used by pretty much everyone if they are externally wastegated on a tubular manifold.

While supporting the dump tube with SS rods or a bracket welded from the turbo flange to your dump tube and possibly your wastegate flange is ideal, an internal anything is not.

-1. Tig welding a 'bellow'(or anything like it) inside a ~1.5 in curved pipe is going to be very difficult. (can you give me your definition of bellow?)

-2. You are going to obstruct flow. The best way to describe it is air cavitation over something like that inside your wastegate tube. Air/gas is very particular in its movement when optimal flow is considered. Its CRITICAL that the path of gas for the wastegate dump tube and recirculation tube is smooth allowing for the highest level of flow. With the 'bellow' installed and the welding to secure it, your looking at a significant disruption in flow.

-3. All manifolds crack. There is no getting away from this. If reliability is your primary concern, then you go with a cast iron manifold. I am mostly concerned with power, functionality, and so forth. When a manifold is built correctly, the chances of it cracking are considered fairly negligible. Thermal management is key to the life of your manifold.

-4. If it cracks, you weld it up, and keep running it.

Also Kwik, that was a picture of my motor a long time ago. That manifold is sold and on my customers car as we speak. I didnt run it without wrapping the rest of the tube.

Not that Chano needs it...but I'm gonna mention it anyway. He's no noob when it comes to KAT or anything related to boost homie. He was driving a KAT when there was only one kit available on the entire WWW.

So you might not have meant to belittle him...but ya did Good to I might add...lol.

[480sx]

Lol i wasnt trying to belittle anyone, especially not him. Its just in my nature... DESTROY....

I know he knows his stuff and i have respect for him. In this instance though, i mean.. This is part of what i do for a living currently lol. Im ingrained into the current performance world, and have been all my life. I am a specialist of sorts in this field, being, fabrication and turbo systems. My business partners and associates for this field are all guru OG's..

I spent the time writing all that out because C-Kwik has offered me the same courtesy time and time again. That being, a well fabricated and thought out argument. I figured id give his post my all and see what he comes up with.
Modified by 480sx at 9:57 PM 7/26/2009

[compression]

Open dump gets annoying after a while....

Vibrant makes a small wastegate muffler, just a way to quiet down your open dump.I remember seeing it 2 years ago at their SEMA booth.

Side note, you should have some sort of flex section, bellows, slip joint, etc. when recirculating your dump, otherwise you are just asking for trouble.Take a look at any name brand header/turbo manifold, they all use a flex when two pipes come together (not including the collector). It is just good practice but by no means absolutely necessary on every application.

[480sx]

Side note, you should have some sort of flex section, bellows, slip joint, etc. when recirculating your dump, otherwise you are just asking for trouble.Take a look at any name brand header/turbo manifold, they all use a flex when two pipes come together (not including the collector).

Can you link me to a few of these manifolds? Neither AMS or Full-Race do this.. They come with 2 year warranties. But im thinking you are just talking about the downpipes with recirculation tubes.. Right?

A flex section between the downpipe and the wastegate can serve a purpose, although it is somewhat negligible IMO. A downpipe is solidly connected to the wastegate and turbo, there isnt much flex there. The most important place to use a flex section is at the bottom of your downpipe. Stock motor mounts and no flex pipe is a manifold cracker because the engine will just sit there and rock itself in its mounts.

It is just good practice but by no means absolutely necessary on every application.

It is good practice, i will agree. Lol if we're talking about the same thing.

[AZhitman]

Open dump here.

Mine points at the ground, and does a good job of cleaning the street.

[DevilMB3017]

I use the stock JGS dump tube. It points straight down the steering column.

It burns holes on the floors of dyno shops.

[compression]

Can you link me to a few of these manifolds? Neither AMS or Full-Race do this.. They come with 2 year warranties. But im thinking you are just talking about the downpipes with recirculation tubes.. Right?

APS always does it on their kits (air power systems, of Australia) and also HKS, just a couple off the top of my head. Like I said, not a necessity for everyone, just good practice. It allows the pipes to expand/contract at different rates relative to each other without inducing high stresses at their joints.I would say that the longer the dump tube is (before being rerouted) the more of necessity it becomes.

[40daws]

[QUOTE=480sx]

Most people recirculate for a DD. If not, its really damned loud. [/QUO

Off topic question for 480sx. Is your turbo draining into your oil pan or is that some kind of oil pump reservoir in the picture ?

[Chris28]

Off topic question for 480sx. Is your turbo draining into your oil pan or is that some kind of oil pump reservoir in the picture ?

The big black tube is the return line. The red thing is an in line oil filter. That's for the feed line.

[480sx]

^^ Yep. The filter is a CM(canton racing) fuel filter thats efficient down to 4 microns. Anything smaller than 5-6 micros blows right through a turbo and shouldnt damage it at all. The only thing you have to worry about at that point is fuel in the oil, or the stupidity of hot shut offs lol.

Works like a charm too. When i pulled the turbo off my blown motor, there wasnt a single piece of embedded metal in the turbo's bearings(as there usually is). Usually, when you spin a bearing, a significant amount of metal goes through your whole oiling system. Turbo included

[kyoung]

thats cool!